diff --git a/.github/workflows/publish_docker_images.yml b/.github/workflows/publish_docker_images.yml
index 45a33b49e..5262ddf4c 100644
--- a/.github/workflows/publish_docker_images.yml
+++ b/.github/workflows/publish_docker_images.yml
@@ -10,10 +10,10 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
     strategy:
       matrix:
         app: ['builder', 'viewer']
+    runs-on: ubuntu-latest
     steps:
       - name: Check out the repo
         uses: actions/checkout@v3